Improvement in artificial stone for pavements, walks, floors



armor girder amt ditto.

OARLETON B. HUTCHINS, OF ANN ARBOR, MICHIGAN.

Letters Patent No. 110.852, dated January 10, 1871/ IMPROVEMENT IN ARTIFICIAL STONE Eon PAVEMENTS, WALKS, FLoo s. &c.

The Sch6du1e referted to in these Letters Patent and. making part; of the lame .To'prepare this composition, I take six hundred pounds of sand or gravel, one hundred and fifty pounds of rosin, five gallons of vegetable tar. -A part ground stone of any kind can be added, if wished.

If I wish to make it more compact and water-tight,

I add small quantities of dried clay.

.If I wish to give the flooring a red color, I add 'a small quantity of Venetian red. I

If I wish to make it white, I dress up the top with whiting or plaster ot Earls, partly calcined.

You can increase or'diminish any of the beforenamed ingredients and vary their introduction, as before stated. Y I

' I boil these ingredients togethervery thoroughly, which serves to make the combination very tough and durable, and is nearly inodorous, which gives it great advantages over all mineral tar.co|npoliud.- It is,

also perfectly impervious to water.

\Vhatl claim as my invention, and desire to sccure' by Letters Patent, is-

The compound produced by uniting the ingredients as set forth in the foregoing specification. I

i OABLE'LON B. HUTOHINS.

Witnesses:

J MESIGK, T5208.- -M ULLEN. 

